I apologise for the muddle I have caused by my misunderstanding of the digitalisation process.
I have received only one 'chopped off' image. This was a couple of years ago.
Not understanding, I requested a 'duplicate', and of course GRO sent me the same image as before. (I didn't pursue the matter further - could be bothered, too much hassle, not vital to my research).
The resulting thread has been interesting anyway! Thank you.
Melbell